Scientific Papers

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Novel method for shark age estimation using near infrared spectroscopy

Novel method for shark age estimation using near infrared spectroscopy

Published online on 21. July 2015 Novel method for shark age estimation using near infrared spectroscopy C. L. Rigby, B. B. Wedding, S. Grauf, C. A. Simpfendorfer ABSTRACT: Accurate age determination is an important component of assessing and managing fish populations, yet traditional ageing using growth bands is time-consuming and has limitations. In the...

Vertical and horizontal movements of a silvertip shark in the Fijian archipelago

Vertical and horizontal movements of a silvertip shark in the Fijian archipelago

Published on 14. July 2015 Vertical and horizontal movements of a silvertip shark (Carcharhinus albimarginatus) in the Fijian archipelago Mark E Bond, Emily Tolentino, Sangeeta Mangubhai, Lucy A Howey ABSTRACT: Background Despite widespread distribution and occurrence in the global shark fin trade, information regarding fundamental biology of the silvertip shark, especially vertical and horizontal...

The Role of Olfactory Cues in the Homing Behavior of Blacktip Sharks

The Role of Olfactory Cues in the Homing Behavior of Blacktip Sharks

Published online on 13. July 2015 Smells Like Home: The Role of Olfactory Cues in the Homing Behavior of Blacktip Sharks, Carcharhinus limbatus Jayne M. Gardiner, Nicholas M. Whitney, Robert E. Hueter ABSTRACT: Animal navigation in the marine environment is believed to be guided by different sensory cues over different spatial scales. Geomagnetic cues...

Restricted movements and mangrove dependency of the nervous shark

Restricted movements and mangrove dependency of the nervous shark

Published online on 14. July 2015 Restricted movements and mangrove dependency of the nervous shark Carcharhinus cautus in nearshore coastal waters L. Escalle, C. W. Speed, M. G. Meekan, W. T. White, R. C. Babcock, R. D. Pillans, C. Huveneers ABSTRACT: This study used a network of acoustic receivers deployed around a no-take zone...

Age and growth of the midwater crocodile shark Pseudocarcharias kamoharai

Age and growth of the midwater crocodile shark Pseudocarcharias kamoharai

Published online on 14. July 2015 Age and growth of the midwater crocodile shark Pseudocarcharias kamoharai R. Lessa, H. A. Andrade, K. L. De Lima, F. M. Santana ABSTRACT: Age and growth were analysed on the basis of 372 vertebrae from specimens of the crocodile shark Pseudocarcharias kamoharai (66·0–122·0 cm, total length, LT) collected in...

Feeding habits of the speckled guitarfish Rhinobatos glaucostigma

Feeding habits of the speckled guitarfish Rhinobatos glaucostigma

Published online on 06. July 2015 Feeding habits of the speckled guitarfish Rhinobatos glaucostigma (Elasmobranchii: Rhinobatidae) R. E. Lara-Mendoza, J. F. Márquez-Farías, J. C. Román-Reyes ABSTRACT: The stomachs of 464 speckled guitarfish Rhinobatos glaucostigma were sampled from the south-eastern Gulf of California (GC) to determine diet composition. Numerical indices and prey-specific index of relative...

Ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks

Ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks

Published online on 13. July 2015 Dental lessons from past to present: ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks Alwina Luebke, Joachim Enax, Kateryna Loza, Oleg Prymak, Peter Gaengler, Helge Fabritius, Dierk Raabe, Matthias Epple ABSTRACT: Teeth represent the hardest tissue in vertebrates and appear very early in their...

Public awareness of the economic potential and threats to sharks of a tropical oceanic archipelago in the western South Atlantic

Public awareness of the economic potential and threats to sharks of a tropical oceanic archipelago in the western South Atlantic

Published online on 19. June 2015 Public awareness of the economic potential and threats to sharks of a tropical oceanic archipelago in the western South Atlantic Ricardo C. Garla, Renato H.A. Freitas, Janaina F. Calado, Gustavo B.C. Paterno, Adriana R. Carvalho ABSTRACT: Conservation actions for sharks are hampered partly by the negative beliefs and...

Sexual development and maturity scale for the angel shark Squatina squatina

Sexual development and maturity scale for the angel shark Squatina squatina

Published online on 11. June 2015 Sexual development and maturity scale for the angel shark Squatina squatina (Elasmobranchii: Squatinidae), with comments on the adequacy of general maturity scales Filip Osaer, Krupskaya Narváez, José G. Pajuelo, José M. Lorenzo ABSTRACT: This paper contributes to the reproductive biology of the genus Squatina and aims to complement...

Standardized catch rate of cockfish, Callorhinchus callorynchus, in a bottom trawl fishery of Patagonia

Standardized catch rate of cockfish, Callorhinchus callorynchus, in a bottom trawl fishery of Patagonia

Published Apr./June 2015 Standardized catch rate of cockfish, Callorhinchus callorynchus, in a bottom trawl fishery of Patagonia: Is it possible its use as a predictor of abundance trend? Juan F. Bernasconi, María Raquel Perier, Edgardo E. Di Giácomo ABSTRACT: The catch per unit of effort (CPUE) data of cockfish, Callorhinchus callorynchus, during 1986-2011 was...

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